Undocumented apps: per-device filter and wider device column; presence for Skip USMT

- Source Devices in the undocumented-apps list filters by device name, like
  the software columns; Devices and the action column take less room.
- Drop the one-click documented pick (Documented + Only ticked does it).
- Stage legend underline spans label and number.
- Device details title stays on one line; the name truncates instead.
- Presence sweep also pings devices under Skip USMT tags.

USMT-Worker.ps1

@@ -735,27 +735,28 @@ while ($true) {
     $sweepSeconds = $phaseWatch.Elapsed.TotalSeconds
     $phaseWatch.Restart()
 
-    # --- PRESENCE SWEEP: completed pairs ---
-    # Every other device is pinged by the sweep itself on every cycle. Completed pairs skip
-    # their network checks, so they're pinged here: hourly during business hours (cycles only
-    # run then) and on the midnight pitstop.
+    # --- PRESENCE SWEEP: completed pairs and Skip USMT devices ---
+    # Every other device is pinged by the sweep itself on every cycle. Completed pairs and
+    # devices under a Skip USMT tag skip network checks, so they're pinged here: hourly during
+    # business hours (cycles only run then) and on the midnight pitstop.
     $presenceCount = 0
     $presenceDue = ((Get-Date) - $global:LastPresenceSweep).TotalMinutes -ge ($presenceMinutes - 0.5) -or $runFullSoftwareSweep
     if ($presenceDue) {
         $completedDevs = [System.Collections.Generic.HashSet[string]]::new([StringComparer]::OrdinalIgnoreCase)
         foreach ($r in $deviceTable) {
-            if ($r.Pairing -ne "Cached") { continue }
+            if ($r.Pairing -ne "Cached" -and $r.Pairing -ne "Skipped") { continue }
             foreach ($n in @($r."Source Device", $r."Destination Device")) { if ($n -and $n -ne "N/A") { $null = $completedDevs.Add($n) } }
         }
         $toPing = @($completedDevs | Where-Object { -not $global:PingedThisCycle.Contains($_) } | Sort-Object)
-        Write-Host "`n[Presence Sweep: pinging $($toPing.Count) device(s) from completed migrations]" -ForegroundColor Cyan
+        Write-Host "`n[Presence Sweep: pinging $($toPing.Count) completed / Skip USMT device(s)]" -ForegroundColor Cyan
         $i = 0
         foreach ($n in $toPing) {
             $i++
             Update-WorkerState "Presence Sweep..." $i $toPing.Count $globalLastDuration "Calculating..."
             $null = Test-Device $n -Session $session
         }
-        # Cached / skipped rows pick up the fresh result
+        # Completed rows pick up the fresh result (Skip USMT rows keep "Skipped" in the ping
+        # column; their presence shows in the device details and Custom View)
         foreach ($r in $deviceTable) {
             if ($r.Pairing -eq "Cached") { Set-RowPresence $r -Source -Destination }
         }